June 2002
Intermediate to advanced
504 pages
10h 10m
English
Content preview from Java™ 2 Micro Edition Application DevelopmentBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Freeing Unused Variables and Resources
The Java garbage collection mechanism usually frees unused objects automatically. “Unused” from the point of view of the garbage collector means that the objects are not referenced from somewhere else. If objects are no longer needed in a program, but are still referenced by a variable or indirectly by another object, the garbage collector can't determine that the object can be removed, and the corresponding memory is not reclaimed. Thus, if an object is allocated and then no longer needed, but the variable holding the object is still in the valid scope, it may make sense to set the variable to null explicitly. For example, if a buffer is allocated at the beginning of a method, but then no longer needed ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.